HGF was evaluated for susceptibility to tyrosine nitration by subsequent ECL-Western blotting to detect nitrotyrosines
Beyond direct scavenging, L-Glutathione is the essential cofactor for a family of highly specialized antioxidant enzymes known as Glutathione Peroxidases (GPx)
Imai H, Hakkaku N, Iwamoto R, Suzuki J, Suzuki T, Tajima Y, Konishi K, Minami S, Ichinose S, Ishizaka K, et al
Add to this the complexity of modulation of topicals (skin irritation, skin threshold, cycling etc..The whole melasma treatment process can get very complex indeed, & that is before we even add any lasers or novel peels (of which there are over 20 methods in 5 to 10 settings or combinations)
Physiological Reviews, 1983